In a word no.
Apply the logic I preach about optional accessories to incremental console upgrades...... developers want to sell their games to as many people as possible, so they are NOT going to make a game that requires the 4.5 or waste money on developing 4.5 exclusive features when they don't have to. Yes I'm aware of the mandate Sony has given in regards to future games having to have "enhanced modes" for the 4.5, but history has shown us that you can't really tell developers what to do. They will either half-ass the 4.5 mode, or even worse intentionally cripple features on the 4.0. Needless to say, this 4.5 nonsense is going to go over as well as the Sega 32x or the DSi.
Now keeping all of that in mind.... I believe the 4.5 is going to be designed to handle 4k video well, so if 4k streaming services ever catch on big, it might be worth it for that. Then again I'm sure Roku or Amazon will come out with a 40 dollar stick to take care of those needs.
I will say this... the PS4/XB1 might very well be the last consoles for those respective companies. Microsoft's goal was to get the windows marketplace in as many homes as humanly possible and with windows 10 they are slowly but surely making that a reality. Sony is just hurting financially. Perhaps Spiderman's inclusion in the MCU will get them some much needed cash-flow, but with box office stinkers like the Ghostbusters reboot on the horizion, they might bleed so much money that they have to cut other divisions.
Even the un-moveable Nintendo seems to be hitting hard times... they sold stock in the Mariners, they are cutting their losses early on the Wii U, something they haven't don't since the Virtual Boy.... things are just dark all over in videoland.